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  <script>
    // 解构赋值拷贝对象&数组
    const arr = [1,2,3,4,5]
    const [a, ...newArr] = arr
    const obj = {a: 1, b: 2, c: 3}
    const {...newObj} = obj
    console.log(a, newArr);
    console.log(newObj);
  </script>
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